Question

define residual volume ..??​

Answer 1

Answer:

Residual volume (RV) is thevolume of air remaining in the lungs after maximum forceful expiration. In other words, it is the volume of air that cannot be expelled, thus causing the alveoli to remain open at all times. The residual volumeremains unchanged regardless of the lung volume at which expiration was started.

Answer 2

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Residual volume is necessary for breathing and proper lung function. This air that remains in the lungs is also important for preventing large fluctuations in respiratory gases—oxygen (O2) and carbon dioxide

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